use std::fmt::Display;
use serde::{de, ser};
pub type SerResult<T> = std::result::Result<T, SerError>;
pub type DeResult<T> = std::result::Result<T, DeError>;
#[derive(Debug, Clone)]
pub enum SerError {
Message(String),
FloatingPointNotSupported,
Io(String),
DictionaryKeyMustBeString,
FromUtf8Error(std::string::FromUtf8Error),
}
#[derive(Debug, Clone)]
pub enum DeError {
Message(String),
UnexpectedEof,
SyntaxError(u8, Option<u8>),
ParseIntegerError(btoi::ParseIntegerError),
Utf8Error(std::str::Utf8Error),
ExpectedString,
ExpectedDictionary,
ExpectedEndOfDictionary,
ExpectedUnitStructName,
ExpectedInteger,
ExpectedCharString,
}
impl From<btoi::ParseIntegerError> for DeError {
fn from(e: btoi::ParseIntegerError) -> Self {
DeError::ParseIntegerError(e)
}
}
impl From<std::str::Utf8Error> for DeError {
fn from(x: std::str::Utf8Error) -> Self {
DeError::Utf8Error(x)
}
}
impl From<std::io::Error> for SerError {
fn from(ioe: std::io::Error) -> Self {
SerError::Io(ioe.to_string())
}
}
impl From<std::string::FromUtf8Error> for SerError {
fn from(ue: std::string::FromUtf8Error) -> Self {
SerError::FromUtf8Error(ue)
}
}
impl ser::Error for SerError {
fn custom<T>(msg: T) -> Self
where
T: std::fmt::Display,
{
SerError::Message(msg.to_string())
}
}
impl de::Error for DeError {
fn custom<T>(msg: T) -> Self
where
T: std::fmt::Display,
{
DeError::Message(msg.to_string())
}
}
impl Display for SerError {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
SerError::Message(s) => f.write_str(s),
SerError::Io(io) => f.write_str(io),
SerError::DictionaryKeyMustBeString => {
f.write_str("only byte strings allowed to be keys in dictionary")
}
SerError::FloatingPointNotSupported => {
f.write_str("floating point numbers are not supported")
}
SerError::FromUtf8Error(ue) => f.write_fmt(format_args!("{}", ue)),
}
}
}
impl Display for DeError {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
DeError::Message(s) => f.write_str(s),
DeError::UnexpectedEof => f.write_str("unexpected EOF"),
DeError::SyntaxError(expected, got) => f.write_fmt(format_args!(
"syntax error: expected - {}, got - {:?}",
*expected as char, got
)),
DeError::ParseIntegerError(pie) => f.write_fmt(format_args!("{}", pie)),
DeError::Utf8Error(ue) => f.write_fmt(format_args!("{}", ue)),
DeError::ExpectedString => f.write_str("expected byte string"),
DeError::ExpectedDictionary => f.write_str("expected dictionary"),
DeError::ExpectedEndOfDictionary => f.write_str("expected enf of dictionary"),
DeError::ExpectedUnitStructName => f.write_str("expected name of the unit struct"),
DeError::ExpectedCharString => {
f.write_str("expected byte string with length at most 4 bytes")
}
DeError::ExpectedInteger => f.write_str("expected integer"),
}
}
}
impl std::error::Error for SerError {}
impl std::error::Error for DeError {}